Microplastic and heart disease are both potentially going to affect my health, but the direct impact of heart disease is a lot easier to prove and test for...
Although the fats in butter have good heat stability, and the proteins can be easily removed by melting the butter and letting them settle out to make clarified butter, butter also contains cholesterol, which is not so easily removed. Although dietary cholesterol is likely safe to eat in its raw form, it's easily oxidized by heating in air, and oxidized cholesterol is implicated in health risks, e.g.:
